A look back at the Hubble Space Telescope’s legacy and scientific contributions as it completes 30 years in orbit In a 2010 interview to the European Space Agency, John M.
Grunsfeld, an American physicist and former Nasa astronaut, said that a service mission to the Hubble Space Telescope was like the “holy grail" of “going up there" and doing something that is widely regarded as extremely important.
Grunsfeld has been part of three missions to the Hubble, his last one being in 2009. This year the “holy grail" of space telescopes completes 30 years in orbit.
In fact, the Hubble was deployed into low Earth orbit this week (on April 25) exactly three decades ago, after being launched on the space shuttle Discovery a day before.